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nkslsj
25.07.2020 •
Mathematics
If the area of the trapezoid below is 75 square units, what is the value of x? AB=17 DC=8
A. 1.5
B. 12
C. 6
D. 3
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Ответ:
Diagram related to the question can be found in the attached picture below :
6 units
Step-by-step explanation:
From the diagram attached to the question:
Length AB = 17
Length DC = 8
height (h) = x
Area of trapezium = 75sq units
The Area (A) of a trapezium is given by:
(1/2) × (a + b) × h
Where ;
a and b are the upper and base lengths of the trapezium
h = height of trapezium
A = (1/2) × (a + b) × h
75 = (1/2) * (17 + 8) * x
75 = 0.5*25*x
75 = 12.5x
x = 75 / 12.5
x = 6 units
Ответ:
Find out the what was the original price of her purchase .
To prove
Let us assume that the original price of her purchase be x.
As given
A store is having a 20%-off sale on all merchandise. If Mai buys one item and saves $13 .
20% is written in the decimal form.
= 0.20
Than the equation becomes
x × 0.20 = 13
x = $65
Therefore the original price of her purchase is $65.